Police officials are expected to announce plans to boost coordination with other agencies, as well as among NYPD top brass, this week, in the wake of a report about the department’s Sept. 11 response.

The thick report, based on interviews with roughly 800 police officers and brass, and on internal documents, is expected to recommend a string of changes to help the NYPD better prepare for future large-scale attacks. The report is slated for release this week.

The report says the department did some things well during the horrific attacks, such as rescuing civilians and evacuating the area around the World Trade Center, but also reportedly cites flaws in the way the NYPD and the FDNY traded information, and in leadership over cops responding to the scene.

The four-month report by McKinsey & Co., which normally does management consulting, says that many cops weren’t sure who they should report to after the attacks, and that the NYPD didn’t perform enough drills or give enough training in disaster response, the New York Times reported yesterday.

Sunny Mindel, a spokeswoman for former Mayor Rudy Giuliani, said he “could not possibly comment or respond to a report that was leaked to the press, and for which he wasn’t even included or interviewed.”

McKinsey officials referred calls to the NYPD, and it was unclear who at the top department levels were interviewed. One source familiar with the report said former Police Commissioner Bernard Kerik was interviewed about 10 days ago.

City Hall and police brass wouldn’t comment on the report, and officials were tight-lipped about what changes are in the making. There’s a similar report set to be issued this week on the FDNY.

But even before the report, the NYPD started beefing up inter-agency communications.

In the last few months, senior NYPD commanders have attended weekend training exercises at the Naval War College in Rhode Island. And the department plans to bring the college’s experts to the city to train other police officials on how to respond to different types of attacks.

The FDNY also now has access to the NYPD’s aviation unit helicopters, which lets them survey from above major fire scenes, such as last weekend’s Con Ed substation explosion.

John Driscoll, president of the Captains’ Endowment Association, which represents 750 senior police officials, said he hoped the report would lead to improvements.

“There never has been great coordination between the police and fire departments,” said Driscoll, who hasn’t seen the report.